Alert archive / New Jersey / Flash Flood Warnings in 2024
Flash Flood Warning 22, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 21, 2024, 7:59 PM EDT for Burlington County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2024, 7:59 PM EDT (23:59 UTC)
- Expired
- Jul 21, 2024, 9:51 PM EDT
- In force
- 112 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 00:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 12.0 hours before the alert went out and 204 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1500 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
210
WGUS51 KPHI 212359
FFWPHI
NJC005-PAC101-220400-
/O.NEW.KPHI.FF.W.0022.240721T2359Z-240722T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
759 PM EDT Sun Jul 21 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
West Central Burlington County in southern New Jersey...
Northeastern Philadelphia County in southeastern Pennsylvania...
* Until midnight EDT tonight.
* At 759 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Philadelphia, Riverside, Palmyra, Holmesburg, Tacony, Wissinoming,
Cinnaminson, Riverton and Moorestown-Lenola.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 40 and 45.
Interstate 95 in Pennsylvania between mile markers 28 and 33.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4005 7510 4006 7510 4006 7509 4009 7506
4006 7498 4005 7498 4005 7497 4001 7484
3995 7490 4003 7512
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
RCM1 follow-up statement
623
WGUS71 KPHI 220151
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
951 PM EDT Sun Jul 21 2024
NJC005-PAC101-220201-
/O.CAN.KPHI.FF.W.0022.000000T0000Z-240722T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Philadelphia PA-
951 PM EDT Sun Jul 21 2024
...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL BURLINGTON AND
NORTHEASTERN PHILADELPHIA COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 4005 7510 4006 7510 4006 7509 4009 7506
4006 7498 4005 7498 4005 7497 4001 7484
3995 7490 4003 7512
$$
RCMNearby
Flash Flood Warnings in New Jersey, 2024Flash Flood Warnings in Pennsylvania, 2024Every flash flood warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.